Home / 1,428,561.57-1,970,853.75-816,385.91

Finding the Fourth Proportional to 1,428,561.57, 1,970,853.75 and 816,385.91

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Solution

The fourth proportional to 1,428,561.57, 1,970,853.75 and 816,385.91 is: 1,126,291.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,561.57 : 1,970,853.75 = 816,385.91 : x
  2. Step 2: Convert to fraction form
    1,428,561.57/1,970,853.75 = 816,385.91/x
  3. Step 3: Cross multiply
    1,428,561.57x = 1,970,853.75 × 816,385.91
  4. Step 4: Simplify right side
    1,428,561.57x = 1,608,977,232,170.66
  5. Step 5: Solve for x
    x = 1,608,977,232,170.66/1,428,561.57
  6. Step 6: Final answer
    x = 1,126,291.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.